//! Copyright (c) 2005-2008, Simon Howard
//! Permission to use, copy, modify, and/or distribute this software for any purpose
//! with or without fee is hereby granted, provided that the above copyright notice
//! and this permission notice appear in all copies.
//! THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
//! REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
//! FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
//! INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
//! LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
//! OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
//! PERFORMANCE OF THIS SOFTWARE.

use std::vec::Vec;

/// Sets the allocation limit for testing purposes.
/// A limit of `-1` disables the allocation limit.
pub fn alloc_test_set_limit(limit: i32) {
    // Implementation of setting allocation limit
}

/// Retrieves the current amount of allocated memory.
pub fn alloc_test_get_allocated() -> i32 {
    // Implementation of getting allocated memory
    0
}

/// Runs a single unit test.
/// Ensures that no memory is leaked by the test.
fn run_test(test: Box<dyn Fn()>) {
    // Turn off any allocation limits that may have been set by a previous test.
    alloc_test_set_limit(-1);

    // Run the test.
    test();

    // Check that all memory was correctly freed back during the test.
    assert_eq!(alloc_test_get_allocated(), 0, "Memory leak detected in test");
}

/// Runs a list of unit tests.
/// Iterates over the provided list of tests and executes each one.
pub fn run_tests(tests: Vec<Box<dyn Fn()>>) {
    for test in tests {
        run_test(test);
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    /// A sample test function that allocates and deallocates memory.
    fn sample_test() {
        // Simulate memory allocation and deallocation.
        alloc_test_set_limit(100);
        // Perform some operations that allocate and deallocate memory.
        alloc_test_set_limit(-1);
    }

    #[test]
    fn test_run_single_test() {
        let test = Box::new(sample_test);
        run_test(test);
    }

    #[test]
    fn test_run_multiple_tests() {
        let tests: Vec<Box<dyn Fn()>> = vec![
            Box::new(sample_test),
            Box::new(sample_test),
        ];
        run_tests(tests);
    }
}
